Improvement in roll-grinding machines



:r. MEGAW. ROLL-GRINDING MACHINES.

No. 193,984. Patented Au 7,1877.

VII/11M N-PEI'ERS. PHOTO-LITHOGRAFHER. WASHINGTON. O C- UNITED STATES}.

JARRETT MEGAW, OF PHILADELPHIA, PA., ASSIGNOR OF ONE-HALF HIS RIGHT TOLOBDELL OAR WHEEL COMPANY, OF WILMINGTON, DEL.

IMPROVEMENT IN ROLL-GRINDINGMACHINES.

Specification forming part of Letters Patent No. 193,984, dated August7, 1877; application filed February 26, 1877,

To altwhom it may concern: V

Be it known that I, JARRETT lVIEGAW, of Philadelphia, Pennsylvania,haveinvented a new and useful Improvement in Machines for GrindingRolls, of which the following is a specification:

My invention relates to machinery for grinding and polishing chilledrolls; and the object of my invention-is to provide a machine of thisclass with appliances whereby a roll may be reduced to a greater degreein the middle than at the ends, or vice versa, and whereby differentdegrees of taper from the middle to the ends may be imparted todifferent rolls.

In the accompanying drawing, Figure l is a front view of theroll-grinding machine;

- Fig. 2, a vertical section on the line 1 2; Fig.

3, a plan view; Fig. 4, a vertical section on the line 3 4; Fig. 5, anenlarged view of part of Fig. 4; and Fig. 6, an enlarged view of part ofthe machine. y

A is the base of the machine, having bearings a a, to which are adaptedthe journals 1) b of the chilled roller B. A Tor-V shaped groove, (1, inthe base-plate extends from end to end of the same,'an d to this. grooveare adapted two sliding studs, 0 c, Fig. 1, and to the stud e is hingeda bar, D, a similar bar, D, being hinged to the stud e, and the two barsbeing hinged together by a rule-joint, f, immediately beneath which is aset-screw, h,

- adapted toa stud, h, which can slide along a projection on the frame.By means of this screw the bars D and D can be adjusted to difierentinclinations, and it is these bars which control the position of thegrinding-wheel H in respect to the axis of the roll, in a manner which Iwill now proceed to describe. This wheel has its hearings in a slide, E,adapted to guides on a plate, F, on which the slide can be traversed toand fro by a screw or other device. This plate F is hinged at-w to twostandards, t 2', secured to opposite edges of a projection, m, on themain slide or carriage G,on the under side of which are two V-shapedribs, adapted to similarly-shaped guides on the base A, a screw or othermechanism being used as a means of traversing the carriage to and fro onthe base.-

The plate F, which carries the slide E and its grinding-wheel, issupported partly by the pin of the hinge :20, and partly by the rods DD, which control the movement of the said plate on its hinge, andtherefore control-the position of the grinding-wheel as the carriage Gis traversed along the base of the machine.

date itself'to the edges of the bars, no matter what may betheirposition.

The hangers p p are preferably made vertically adjustable on the plateF, for obvious The hinged plate F should be combined with applianceswhich always tend to depress that end which carries the wheel, and tocause the roller 8 to bear on the edges of the bars 1) D under allcircumstances, thereby insuring the steady maintenance of thegrindingwheel in the vertical position determined by the bars. In orderto effect this, I prefer to use coiled springs t, surrounding boltswhich pass through the projection 12?. of the carriage, and through theplate F, which is depressed by the springs, the latter being confinedbetween the plate and the heads of the bolts.

In the present instance the con trolling-bars ,D D have been raised inthe middle by the adjusting-screw It, and the rapidly-revolvinggrinding-wheel H is acting on the slowly-revolving chilled roll, at apoint midway, or thereabout, between its opposite ends.

The center of the grinding-wheel is above a line, 2 2, Fig. 2. drawnthrough the center of the hinge w, and through that of the chilled roll;but, as the grinding-wheel is traversed with the carriage G in eitherdirection, the center of the grinding-Wheel must, owing to theinclination of the controlling-bars, gradually move downward in the arcof a circle, of which the hinge as is the center, and the periphery of lthe Wheel must at the same time move toward the axis of the chilledroll, and the latter must, consequently, be reduced in diameter as thewheel is moved longitudinally toward either end of the roll; hence, whenthe roll is finishedfrom end to end, it must have the largest diameterin the middle, and have the proper taper from the middle to the oppositeends.

two inclined planes, may be used when a num-.

ber of rolls of precisely similar character are required ,1 but, forgeneral use I prefer the two bars hinged together. Thelocation of thepivots e e and the situation of the hinge f longitudinally, however, maybe varied, as the length and position of the rollsv may suggest. It maybe remarkedthat the position of the hinge w and that of the upper edgesof, the con trolling-bars should be such in respect to each other and tothe grinding-wheel that in tinishing the roll the center of thegrindingwheel, should never be below the line 2 2, drawn through-thecenter of the said hinge and that, of the roll.

In both cases the degree of differ Although I have shown but onegrindingwheel, I prefer to use two, operatingon opposite sides of theroll simultaneously, both wheels being on the same carriage G, andcombined with appliances described above.

I claim as my invention-.

1. The combination, in a roll-grinding machine, of a carriage, to betraversed on the base of the machine, a plate piv'oted to the saidcarriage, and. carrying the grinding-wheel,two inclined planes on thebase and mechanism, substan tially as described, whereby the planes aremade to control the said pivoted plate and grinding-wheel, allsubstantially as set forth. 2. The combination, in a roll-grindingmachine, of adjustable bars D D, hinged together at f, with the hingedplate F carrying the grindingwheel. and the carriage Gr.

3. The combination of the hinged plate F and bars D D, and the roller s,made selfaccommodatingto the edges of'thef said: bars,

substantially as described.

In testimony whereof I, have signed my name to this specification, inthe presence of two subscribing witnesses.

J ARRETT MEGAW..

Witnesses HERMANN MOESSNER, HARRY SMITH.

